Look for 'blank' areas on your map towards where you started. This is one of the things that bugs me, if you follow the quest path you end up in areas that are too high level so you need to retrace your path.

Try just wandering around and exploring. Maybe do those dark anchors more than once at each dolmen. There is a chance of a named boss coming from them and granting you with some nice loot and an achv for killing them. Also public dungeons will many times have quests within them along with a skyshard so they are worth running through as well. I've also noticed that if you try to avoid combat a lot of the time you might end up under leveled. Instead of sneaking or running past that area full of mobs just make a path of death . I tended to be over leveled for every area I entered. I've completed maybe 3-4 quests in coldharbour and got to v1. Another fun way to get xp is just to go chest hunting. Every time you unlock a chest you receive xp. I ran around coldharbour this morning doing nothing but collecting nodes and chests as it was early in the morning and there were very few people on. If you're having trouble finding chests try doing an instanced dungeon. There will usually be a minimum of around 10 chests hidden as you clear it then more will spawn after you finish the final boss. Same with the heavy sacks. Those heavy sacks can be real nice when you find 2 Rekuta or 2 Kuta runes at once. I hope this gives you some fun options to just "grinding" as i'm not a big fan of doing that either.

Good sources of experience which are easily missed I have found:

Dungeon quests, chests, anchor events, public dungeons (don't get much unless you kill the last boss which may or may not be up for very long), and random events.